Mk2 Airbox vacuum motor

[Klaus Schlueter]

Thanks a lot Ken for the detailed information.
Klaus

[Klaus Schlueter]

With a vacuum pistol I tried wether the vacuum motor works--it didn't move. So how do I get access to the unit? I speculated that the metal bracket is spot welded on one side to the air box but couldn't find any welding spots.
Can anyone help?
Klaus

K1600_IMG_4458.jpg

[jbuckl]

The welds are under the reflected area of the picture (2x small ~ approx 2.5mm diameter ones)
Warm the area and wire brush....they should become visible
IIRC I drilled them & replaced with M5 riv-nuts and 2 stainless button head hex drive screws.
This was to enable the whole air-box to be satin-chromed.
The vacuum unit survived the chroming!

[Klaus Schlueter]

Many thanks for your answer jbuckl, I'll try to find the spots an drill them out.

Klaus

[v8ken]

Sorry about the delay,I drilled the spot welds and used rivets to re-secure after replacing the diaphragm,,

It was tricky prying the metal around the circular housing,but can be done with patience and a small screwdriver,be careful though,as it is under pressure from the spring,then replace the diaphragm, I used pliers to turn the edge back round,whilst using a large 'wire tie' around the unit to compress the spring.
I hope this makes sense.
Take lots of photos to refer to+measure the length of the small bent rod,before making a new one.
Seasons greetings,Ken.
ps, After you have re-built it,you can test it with the tube directly from the manifold connection (engine running),by connecting then disconnecting,it goes with quite a 'thump'.

[Klaus Schlueter]

Many thanks Ken, important infos in addition to your pictures in post 10+11.

My airboxhas been painted with a solvent resistant paint so I made the mistake to find the welding spots by grinding the paint off. Beautiful surface now but no spots.
Do you by any chance have a photo showing the two drilling holes and the location of the spots on your airbox?

Klaus

[v8ken]

Hi Klaus,
I've just taken a photo of my airbox.
The photo shows the two rivets that I put in,that is where the spot welds were.

When you find them and drill them out,the bracket lifts off after you unhook the other side (where there are no welds-just a slot where the bracket hooks into)
You can then lift the vacuum motor and carefully unhook the bent rod from the flap.This is a good time to measure the rods length from the body of the vacuum motor.

I should have taken more photos,but you could study other pictures of Stags-under bonnet views.to see the spot welds.
Ken.IMG_1244.JPG

[Klaus Schlueter]

Thank you very much Ken for spending your time to take the picture. Very helpful. It looks like the welding was carried out asymmetrically without a template.

Klaus